1031 51ST PL SW Geotech Report 2023-06-23

APPENDIX A FIELD EXPLORATIONS GENERAL Subsurface conditions at the site were explored by excavating five test pits (TP-1 through TP-5)to depths ranging between 4.0 to 10.0 feet BGS. The test pits were completed on August 17, 2018 by the client, NW Homefinders, Inc. of Mukilteo, Washington, using a Kubota KX057-4 track- mounted excavator. The explorations were observed by a member of our geotechnical staff. The exploration logs are presented in this appendix. The approximate locations of our explorations are shown on Figure 2. The exploration locations were chosen based on our project understanding communicated by the client and adjusted based on accessibility and avoidance of existing vegetation. The locations of the explorations were determined in the field using readily available reference points. This Information should be considered accurate only to the degree implied by the methods used. SOIL SAMPLING We collected representative samples of the various soils encountered In the explorations for geotechnical laboratory testing. Soil samples were collected from the test pits at observed variations in the soil. Disturbed samples were collected from the teeth of the excavator when changes were observed. Sampling intervals are shown on the exploration logs. SOIL CLASSIFICATION The soil samples were classified in accordance with the"Exploration Key"(Table A-1) and"Soil Classification System"(Table A-2),which are presented in this appendix. The exploration logs indicate the depths at which the soils or their characteristics change, although the change could be gradual. A horizontal line between soil types indicates an observed (visual or excavation resistance) change. If the change occurred between sample locations and was not observed or obvious, the depth was interpreted, and the change Is Indicated using a dashed line. Classifications are shown on the exploration logs. GEODESIGNZ A-i • --- •